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A026712
a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by
A026703
.
+0
1
1, 3, 8, 20, 47, 111, 252, 582, 1303, 2977, 6618, 15028, 33269, 75255, 166152, 374860, 826115, 1860407, 4094612, 9208832, 20248703, 45495079, 99965896, 224440544, 492900919, 1106034259, 2428024608, 5446009600, 11951707547
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.
AT&T Labs Research
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